Tread portion of an automobile tire



FIG. 1 is a perspective view of a tread portion of an automobile tire according to a first embodiment of the invention;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a fragmentary enlarged view showing the details of the tread portion thereof;

FIG. 5 is an end view thaken along the lines 5-5 in FIG. 4; and,

FIG. 6 is an end view taken along line 6-6 in FIG. 4.

Broken lines in the drawing figures are used to show portions of the tire that are not claimed, and thus form no part of the claimed invention. 

The ornamental design for a tread portion of an automobile tire, as shown and described. 